送交者: HunHunSheng 于 2005-10-13, 16:09:19:

回答: 电池的电力来源挺多。可以参考这个网站 由 虎子 于 2005-10-13, 16:04:07:

the only source of electricity is gas.

If you drive from a high place to a low place
and your car slide down the road, then you
may convert potential energy into electricity

• true. the "multiple sources" of energy originally come from gas, too - 虎子 (0 bytes) 2005-10-13, 16:13:37

加跟贴